266530
If a 2 m wire is moving with a velocity of 1 mbs perpendicular to a magnetic field of \(0.5 \mathrm{~W} \mathrm{bm}^2\), then emf induced in it, will be:
1 0.2 V
2 1 V
3 0.5 V
4 2 V
Explanation:
b \[ \begin{aligned} z & =\mathrm{Blv} \\ & =0.5 \times 2 \times 1=1 \mathrm{~V} \end{aligned} \]
**NCERT - XI-I-61**
TEST SERIES (PHYSICS FST)
266531
In an \(L R\) circuit \(f=50 \mathrm{~Hz} . \mathrm{L}=2 \mathrm{H}, \varepsilon=5 \mathrm{~V}, \mathrm{R}=1 \Omega\) energy stored in inductoris:
1 50 J
2 25 J
3 100 J
4 none of these
Explanation:
d Impedance of the LR circuit. \[ \begin{aligned} Z & =\sqrt{R^2+4 \pi^2 \mathrm{f}^2 L^2} \\ & =\sqrt{1^2+4 \pi^2(50)^2 \times 2^2} \\ & =\sqrt{394385} \approx 628 \\ \mathrm{I} & =\frac{\varepsilon}{Z}=\frac{5}{628} \mathrm{~A} \end{aligned} \] Energy stored in the inductor, \[ \begin{aligned} U & =\left.\frac{1}{2} L\right|^2=\frac{1}{2} \times 2 \times\left(\frac{5}{628}\right)^2 J \\ & =6.33 \times 10^{-5} \mathrm{~J} \end{aligned} \]
**NCERT - XI-I-121**
TEST SERIES (PHYSICS FST)
266532
The direction of acceleration in SHM is-
1 is always towards extreme position
2 May be towards mean or away from the mean position
3 Always towards mean position
4 None of these
Explanation:
c
**NCERT - XI-II-267**
TEST SERIES (PHYSICS FST)
266533
If the Ratio of vapour density for Hydrogen and oxygen is \(\mathbf{1 / 1 6}\), then under constant pressure the ratio of their rms velocities will be-
266530
If a 2 m wire is moving with a velocity of 1 mbs perpendicular to a magnetic field of \(0.5 \mathrm{~W} \mathrm{bm}^2\), then emf induced in it, will be:
1 0.2 V
2 1 V
3 0.5 V
4 2 V
Explanation:
b \[ \begin{aligned} z & =\mathrm{Blv} \\ & =0.5 \times 2 \times 1=1 \mathrm{~V} \end{aligned} \]
**NCERT - XI-I-61**
TEST SERIES (PHYSICS FST)
266531
In an \(L R\) circuit \(f=50 \mathrm{~Hz} . \mathrm{L}=2 \mathrm{H}, \varepsilon=5 \mathrm{~V}, \mathrm{R}=1 \Omega\) energy stored in inductoris:
1 50 J
2 25 J
3 100 J
4 none of these
Explanation:
d Impedance of the LR circuit. \[ \begin{aligned} Z & =\sqrt{R^2+4 \pi^2 \mathrm{f}^2 L^2} \\ & =\sqrt{1^2+4 \pi^2(50)^2 \times 2^2} \\ & =\sqrt{394385} \approx 628 \\ \mathrm{I} & =\frac{\varepsilon}{Z}=\frac{5}{628} \mathrm{~A} \end{aligned} \] Energy stored in the inductor, \[ \begin{aligned} U & =\left.\frac{1}{2} L\right|^2=\frac{1}{2} \times 2 \times\left(\frac{5}{628}\right)^2 J \\ & =6.33 \times 10^{-5} \mathrm{~J} \end{aligned} \]
**NCERT - XI-I-121**
TEST SERIES (PHYSICS FST)
266532
The direction of acceleration in SHM is-
1 is always towards extreme position
2 May be towards mean or away from the mean position
3 Always towards mean position
4 None of these
Explanation:
c
**NCERT - XI-II-267**
TEST SERIES (PHYSICS FST)
266533
If the Ratio of vapour density for Hydrogen and oxygen is \(\mathbf{1 / 1 6}\), then under constant pressure the ratio of their rms velocities will be-
266530
If a 2 m wire is moving with a velocity of 1 mbs perpendicular to a magnetic field of \(0.5 \mathrm{~W} \mathrm{bm}^2\), then emf induced in it, will be:
1 0.2 V
2 1 V
3 0.5 V
4 2 V
Explanation:
b \[ \begin{aligned} z & =\mathrm{Blv} \\ & =0.5 \times 2 \times 1=1 \mathrm{~V} \end{aligned} \]
**NCERT - XI-I-61**
TEST SERIES (PHYSICS FST)
266531
In an \(L R\) circuit \(f=50 \mathrm{~Hz} . \mathrm{L}=2 \mathrm{H}, \varepsilon=5 \mathrm{~V}, \mathrm{R}=1 \Omega\) energy stored in inductoris:
1 50 J
2 25 J
3 100 J
4 none of these
Explanation:
d Impedance of the LR circuit. \[ \begin{aligned} Z & =\sqrt{R^2+4 \pi^2 \mathrm{f}^2 L^2} \\ & =\sqrt{1^2+4 \pi^2(50)^2 \times 2^2} \\ & =\sqrt{394385} \approx 628 \\ \mathrm{I} & =\frac{\varepsilon}{Z}=\frac{5}{628} \mathrm{~A} \end{aligned} \] Energy stored in the inductor, \[ \begin{aligned} U & =\left.\frac{1}{2} L\right|^2=\frac{1}{2} \times 2 \times\left(\frac{5}{628}\right)^2 J \\ & =6.33 \times 10^{-5} \mathrm{~J} \end{aligned} \]
**NCERT - XI-I-121**
TEST SERIES (PHYSICS FST)
266532
The direction of acceleration in SHM is-
1 is always towards extreme position
2 May be towards mean or away from the mean position
3 Always towards mean position
4 None of these
Explanation:
c
**NCERT - XI-II-267**
TEST SERIES (PHYSICS FST)
266533
If the Ratio of vapour density for Hydrogen and oxygen is \(\mathbf{1 / 1 6}\), then under constant pressure the ratio of their rms velocities will be-
266530
If a 2 m wire is moving with a velocity of 1 mbs perpendicular to a magnetic field of \(0.5 \mathrm{~W} \mathrm{bm}^2\), then emf induced in it, will be:
1 0.2 V
2 1 V
3 0.5 V
4 2 V
Explanation:
b \[ \begin{aligned} z & =\mathrm{Blv} \\ & =0.5 \times 2 \times 1=1 \mathrm{~V} \end{aligned} \]
**NCERT - XI-I-61**
TEST SERIES (PHYSICS FST)
266531
In an \(L R\) circuit \(f=50 \mathrm{~Hz} . \mathrm{L}=2 \mathrm{H}, \varepsilon=5 \mathrm{~V}, \mathrm{R}=1 \Omega\) energy stored in inductoris:
1 50 J
2 25 J
3 100 J
4 none of these
Explanation:
d Impedance of the LR circuit. \[ \begin{aligned} Z & =\sqrt{R^2+4 \pi^2 \mathrm{f}^2 L^2} \\ & =\sqrt{1^2+4 \pi^2(50)^2 \times 2^2} \\ & =\sqrt{394385} \approx 628 \\ \mathrm{I} & =\frac{\varepsilon}{Z}=\frac{5}{628} \mathrm{~A} \end{aligned} \] Energy stored in the inductor, \[ \begin{aligned} U & =\left.\frac{1}{2} L\right|^2=\frac{1}{2} \times 2 \times\left(\frac{5}{628}\right)^2 J \\ & =6.33 \times 10^{-5} \mathrm{~J} \end{aligned} \]
**NCERT - XI-I-121**
TEST SERIES (PHYSICS FST)
266532
The direction of acceleration in SHM is-
1 is always towards extreme position
2 May be towards mean or away from the mean position
3 Always towards mean position
4 None of these
Explanation:
c
**NCERT - XI-II-267**
TEST SERIES (PHYSICS FST)
266533
If the Ratio of vapour density for Hydrogen and oxygen is \(\mathbf{1 / 1 6}\), then under constant pressure the ratio of their rms velocities will be-
